gpgme-sharp API missing

[Robert J. Hansen]

On https://wiki.gnupg.org/APIs , gpgme-sharp is listed as being in alpha
status for .NET.  Unfortunately, the link is dead and there's no sign of
where it's moved to.  For a while it was hosted on GitHub, but
apparently no more.

If anyone has a copy of the gpgme-sharp source code I'd be happy to host
it on my own GitHub account.  But either way, the link on the wiki needs
to be either updated or removed.